Culvert



Patented May 31,l 1932 UNITED STA-TES PATENT' OFFICE VICTOR B. FREDENHAGEN, F BELIlEVILLE, KANSAS CULVERT Application filed December 5, 1930. Serial No. 500,374.

'1 special fastening means for the top, bottom and side slabs are employed at suitable intervals along the barrel of the culvert. ,Y

A still further object of my invention is' to provide a box culvert which is simple and economical in construction and highly eiii-` cient and durable in use.

Still another object of my invention is to provide suitable break joints7 at the adjacent ends of the respective culvertl sections,

formed by offset overlappingfribs or ianges. f

With the foregoing and other objects in view that will appear as the nature of my invention is better understood, the same consists iny the novel features` of construction,

l i combination and arrangement of parts illustrated in the accompanying drawings and more particularly p-ointed out in the appended claim.

In the accompanying drawings, which are for illustrative purposes only and are therefore not drawn to scale:

Figure 1 is a plan view of a concrete culvert embodying my improvements.

Figure 2 is a sectional view, taken on line 2-2 of Figure .1.

Figure 3 is an end view of one culvert section. v

Referring to the drawings for a more particular description of my invention and in which drawings of like parts are designated by like reference characters throughout the several views, my.y boX culvert is composed of the precast concrete top slabs 1, bottom slabs 2 and side slabs 3 and 4. In

4'" practice, the precast slabs aforesaidY are re-.inforced by the longitudinal and cross wires 5 and 6, respectively, or other equivalent means. The side slabs 3 and 4 are also of fiat rectangular oblong form and are reinforced by the longitudinal and cross wires 7 and S or other equivalent means. The side slabs are arranged between opposite ends of the top-and bottom slabs, with their upper inner corners litting against the outer edges, as 9, of the oifset downwardly projecting supporting ribs 10, formed on the bottom face of the top slab l and with their lower` inner corners litting against the outer edges, as 11, of the offset rupwardly projecting supporting ribs 12, formed on the upper face of the bottom slab.y The supporting ribs 10 and 12 may be of rectangular, triangular or other form in cross section, as desired; Y

The top, bottom and side slabs are rigidly secured together at suitable intervals along the barrel of the culvert, by the diagonally disposed fastening bolts or steel pins 13 and 14, which are embedded in the concrete mortar.

The respective sections of the culvert are provided at their adjacent or meeting ends with suitable break joints, formed by the offset horizontal and vertical yoverlapping iianges 15, 16, 17 and 18. When the culvert sections are placed together or assembled, the aforesaid horizontal and vertical flanges interlock with each other and not only reinforce the whole culvert, but retain the several sections in true alinement and prevent the top and sides of the culvert from being forced. This form of break joint will also prevent dirt or other dbris from getting in at the bottom and practically render ythe several sections when placed together, one culvert.

From the foregoing description taken in connection with the drawings, it is thought that the construction, operation and advantages of my invention will be readily understood, without requiring a more extended eX- planation, y

Having described myv invention, what I claim as new and desire to secure by Letters Patent, is:

A box culvert composed of a plurality of sections, each comprising corresponding liat re-inforced top and bottom slabs and correspending re-nforced side slabs, diagonally disposed fastening bolts or pins, arranged at suitable intervals along the barrel of the i; culvert, to rigidly secure the top, bottom and side slabs together said fastening bolts or pins extending through the side edges of the top and bottom slabs and the adjacent top and bottom edges of the side slabs, offset supporting ribs for the side slabs and oiset horizontal and Vertical voverlapping flanges at the adjacent ends of the culvert sections. In testimony whereof he aiXes his signak ture.

VICTOR B. FREDENHAGEN. 

